Black lines on iPad Pro 2018 screen

First, ensure that you have updated your iPad to the current version of iPadOS. At time of writing, this is iPadOS 16.5. Also ensure that installed Apps have similarly been updated from the Apple App Store App.

A screen hardware fault would be visible for all Apps. If the issue is seen with some Apps - and not others - something else is the cause.

You can easily determine if you have a hardware or software issue. A reliable method to confirm a screen or other hardware fault is to generate a screenshot (not a photograph as illustrated - although a photo is useful for comparison purposes) when the perceived fault is evident - and then review the captured screenshot image, the screenshot being transferred to another device for review if necessary.

When reviewed, if the lines are not present in the screenshot image, then you have demonstrated that you may have a hardware issue. If the lines are visible in the screenshot, the something other than hardware will be the cause.

Note: When reviewing the image, rotating the iPad screen orientation by 90°, from Portrait to Landscape, will ensure that the image does not coincide with screen defects if present.

Take a screenshot on your iPad – Apple Support

If the test indicates that a hardware fault, a visit to the Genius Bar at your local Apple Store is recommended - where the technicians will be able to test and assess your iPad. This will likely inform your next steps:

Genius Bar Reservation and Apple Support Options - Apple

iPad Repair – Official Apple Support

If the problem is isolated to specific Apps, you might be well advised to seek assistance from the associated App Developer. When submitting a potential bug report, ensure that you include explicit details of your iPad model - and the installed version of iPadOS.

How to contact an app developer - Apple Support

Okay, the 11” iPad Pro does have a different screen resolution from the 12.9” models. You may indeed have a discovered a scaling issue.

You would be best advised to directly contact Apple Support. You can contact the Support Team using the Support link at top-right or bottom-left of this page. Alternatively, you can initiate and manage your support cases from Apple devices using the excellent Apple Support App. If not already installed, the App can be downloaded from the App Store:

https://apps.apple.com/app/apple-support/id1130498044

You should also submit a Bug Report via Apple’s Product Feedback portal. For iPad and iPadOS:

Feedback - iPad - Apple

When submitting the bug report, fully outline the issue - and what you have discovered in context of Display Zoom. Be sure to include details of your iPad model and the installed version of iPadOS within the body of the report. Do rely upon the device and version picker alone to identify your iPad model and installed OS.

Every submitted report counts - as Apple may not assign resources to resolve the issue unless a sufficient number of reports are received from end-users.

Omg thank you so much for posting this! The lines on my ipad have driven me crazy for months, I noticed they only pop up when I'm using procreate and I've just tried your tip and it's fixed it! Thank you 😅

Odd…

I’m currently using a iPad Pro 12.9” M1 - with an identical screen resolution - also set-up with Display Zoom set for More Space. I’m unable to replicate the issue that you describe.